1 / 2: Did you know @GNOME Files aka #nautilus has a nifty feature where it can batch rename files? Advanced features include adding sequential numbering, using placeholders and doing search and replace on the names of selected files. #ScreenReader #a11y is preserved.
In order to use it just select multiple files and find Rename item in the shift+F10 popup menu or simply press F2. Also... Don't be shy to press the add button in the batch rename dialog.